Twelve people were reported killed today when Israeli aircraft and artillery bombarded pro-Iranian guerrillas in southern and eastern Lebanon.

Today's events draw attention from Iraq's use of chemical weapons against Iran last month in northeastern Iraq, where pro-Iranian Kurdish guerrillas have been active.

Though clashes erupted within the buffer zone, the Israeli military buildup in the area appeared to have halted rocket attacks across the border by the pro-Iranian fundamentalist guerrillas.

Iran's official news agency said the Iraqi gas attacks occurred between March 21 and March 26 in northeastern Iraq where pro-Iranian Kurdish guerrillas have been active.

International Censure When the attacks began, Mr. Rabin said they would not stop until the pro-Iranian and Palestinian guerrillas ended rocket attacks on the north.

The barrage followed stepped-up attacks by the pro-Iranian guerrillas on the so-called security zone that Israel established in that part of Lebanon.

Arad, shot down over Sidon in 1986, was thought to have been held by pro-Iranian guerrillas in eastern Lebanon.

A13 Twelve die as Israel bombards pro-Iranian guerrillas in Lebanon.

Mr. Christopher traveled to the Middle East at the end of July amid clashes between Israel and pro-Iranian guerrillas in southern Lebanon.

He also promised to "take care" of pro-Iranian guerrillas in southern Lebanon "in our own way."